PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/17-09:28:00
G02     34.3           53.7                4.9 +/-    1.04       5.9 +/-    1.04  0.030 / 0.030
G05     144.6          60.3                7.4 +/-    0.60       8.4 +/-    0.60  0.030 / 0.030
G06     52.4           16.6                3.4 +/-    2.69       8.0 +/-    2.69  0.030 / 0.030
G12     195.6          68.8                5.6 +/-    0.71       6.0 +/-    0.71  0.030 / 0.030
G25     298.4          52.8                5.3 +/-    2.22       6.4 +/-    2.22  0.080 / 0.140
G29     305.5          26.0                5.1 +/-    1.06       9.7 +/-    1.06  0.070 / 0.150